1.mary often exercises and she is quite well.本句中的exercises 为什么要加s呢?2.You hardly know him,-----?A.are you B.aren't you C.do you D.don't you（解释下意思和选择的原因）3.sometime、sometimes、some time的区别4.------in

exercis very how often do you exercise every day?改为同义句__ __ __ a week do you exercis? Mary ,often,mother,the housework 造句 Mary often looks after her little sister.(保持原意)Mary often ______ ______ ______her little sister. 连词成句 1.my me let you introduce sister to 2.often people Mary helps her work in Mary often reads books in night哪里错了 Mary often goes shopping ______ her mother _____ Sunday Mary often helps her mother with housework d( ) the weekends. Mary often runs near the river.(改为现在进行时) mary often watch tv on saturday对 on saturday提问 They often watch TV on Sundays.(用Mary改写句子) Mary often does her homework ( )eight thirty填词 玛丽经常给朋友发电子邮件Mary often( )( ) mary often takes the bus to school,---?反意疑问 How often _ Mary _ (eat) vegetable.横线填什么? 改为被动语态Mary often takes care of the Children. Mary often （ )(fly)kites with her friends in the past. mary often has lunch in the dining h《 》